A Convenient Synthesis of 3-Phenacylidenephthalides
作者:Kimihiko Hori、Naotake Takaishi
DOI:10.1246/bcsj.61.1791
日期:1988.5
3-Phenacylidenephthalides were prepared by the dehydration of 2-(1,3-dioxo-3-phenylpropyl)benzoic acids, obtained in turn by the condensation of phthalic anhydride with acetophenones.
A convenient and highly regio and stereoselective method for the synthesis of (E)-3-alkylidene isobenzofuran-1(3H)-ones (phthalides)
作者:Rupa Mukhopadhyay、Nitya G Kundu
DOI:10.1016/s0040-4020(01)00943-7
日期:2001.11
2-Iodobenzyl alcohol on treatment with acetyleniccarbinols in the presence of a palladium catalyst and copper(I) iodide as a co-catalyst afforded disubstituted alkynes. Jones oxidation of the disubstituted alkynes led to (E)-3-alkylidene isobenzofuran-1(3H)-ones in good yields in a highly regio and stereoselective manner. The E-isomers were obtained exclusively instead of the more stable Z-isomers